Strain-insulator.



M. M; WOOD. Y STRAIN msum'ron. APPLICATION FILED BERT. 16, 1905.

' Patented Mar. 8, 1910.

Mtflesses:

,U/ r w U Be it known that l, l olii'rs ivnsrie Noon, a citizen of theUnited States, reside ing at Chicago, county of Cook, lllinois, haveinvented certain new and use till Improvements in. iffill1lll].5tllfiil0.$, which the following is s specification.

This invention relates to the overhead structure of an electric railway,and pertio ularly to the insulating cou plings used to connect sect-ionsof the guy wires which sup port the Working conductor. These devicesusually (jOfllPl'lSQtWO eyee-olts mechanically connected by 21, massinsulating material so that there is no electrical connection tweenthem, and the esce ne oi? current through the guy-Wires is prevented.132. the coupling is to be used. as a turn-buckle, one of the eyeboltsis screwthreeded, and meshes with a nut embedded in the insul Lg ms,-i'erizil, Whilethe other eyoholt is usually swiveled.

The object of my invention is to provide a simple and inexpensive modeof connect ing the eyebolts in a coupling of t his kind, whether it be asimple strain insulator, or an insulating turnbuckle One of the eyebolts is secured in sleeve or of insulating material having e head orenlarge- .UlBIJlL .inclosed in a metallic cup which extends beyond saidhead and has an internal groove in the projecting portion. The othercyebolt is provided with a flange which into the cup and is securedthere by stout open or cut ring sprung intothe'grocvc in the cup andoverlapping the edge of the flange. In the case of o. turnbuckle, thebolt is loosely swiveled in said flange; the other bolt being screwedinto a screw-tlir a led sleeve embedded in the insulating mm teriel. v

The accompanying.drawing represents a strain turnbuckle embodying myinvention. F ure 1 is a lon 'itudmel section- F1 .3 D b v 7 .4 15 an endwent, and EN. 3 shows the retain 111g r ng. The sleeve 1 having the nut2 at one end and the flange 3 at the other, the eyebolt l screwed intosaid nut the bod 5 of'msn 7 .7 lotion molded around the sleeve and hzwmga head 6 incloslng the flange 3, and the cup 7 surroundln said head witha flan e '8 b Q overlapping the flange 3 and having the proectmg edge9-nr0v1ded with internal shoulder 10', are all old and Well known ininsulators heretofore )1 the semi-circula s outer corner groove ll.

and Jlllllg overleppzh 12 which is \i-ili'iS securely heldi i bolt vthecup 7. l2 serves as the flange of an eyei t of :1 turnbuckle the bolt .eto SV/il JQl in said plate. To accompi this, a circular head or collar15 fin-med on or attached to the bolt under he plate, which ispreferably countersunk sci to receive said head. At end of l bolt is theeye 16. This m, 'n which the bolt and its flange I ieces, may be used,it desired, in non --S;V1\"el11l; strain insulators. The two parts arepreferably assembled by plac- I by Letters Patent of the llnited States,is,

1. A strain insulator having a bodyof insulntiomu metallic cup thereonhaving an internal groove. :1 plate inserted in said cup and havingbowled coriler opposite said groove, :1 1'01 nininp; ring sprung intosaid groove and engaging the beveled corner of the plate, and bollsconnected with said body and plate. I T

2. An. insulating turnlmchle lmving a body of insulation. :1 metalliccup thereon having an internal groove, :1 piste insertcd'in said. cup,:1 retaining ring sprung into said groove, and an eycbolt swivelerl insaid plate.

3. An insulating turnbuckle having a body of insulation, :1 metallic cupthereon having an internal shoulde uni an ii'iternal groove, 2i plateresting mfg ving u bei'eleu corner opposite. sziid k )OVL. a ring sprunginto said groove and overlapping the beveled corner of said plate,

til eyebolt swiveled in said plate.

in insulating tiiurnhuclzle having" ebody inst Fiilld shoulder and thehere-led dge-ct the plate of insulation W1 and GI C-Rlli 131.1

